I was excited to receive this four channel temperature / humidity unit. It was easy to set up and use but within two months the clock was indicating the incorrect time in addition the humidity readings, for all four channels, we off by more than five percent. I would reset the clock to the correct time but within a day or so, it was hours out from the actual time. The four temperatures seem to indicate acceptable reading but the humidity and the time are not accurate & I therefore can't recommend this unit.